/*
 * Copyright (C) 2012 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package interactivespaces.master.server.services.internal.jpa.domain;

import interactivespaces.domain.basic.ActivityConfiguration;
import interactivespaces.domain.basic.ConfigurationParameter;

import java.util.Map;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.Version;

import com.google.common.collect.Maps;
import com.google.common.collect.Sets;

/**
 * A JPA implementation of a {@link ActivityConfiguration}.
 * 
 * @author Keith M. Hughes
 */
@Entity
@Table(name = "activity_configurations")
public class JpaActivityConfiguration implements ActivityConfiguration {

	/**
	 * The persistence ID for the activity.
	 */
	@Id
	@GeneratedValue(strategy = GenerationType.AUTO)
	@Column(nullable = false, length = 64)
	private String id;

	/**
	 * The name of the configuration.
	 */
	@Column( nullable = true, length = 512 )
	private String name;

	/**
	 * The description of the configuration.
	 */
	@Column( nullable = true, length = 2048 )
	private String description;

	/**
	 * The parameters in the configuration.
	 */
	@OneToMany(targetEntity = JpaConfigurationParameter.class, cascade = CascadeType.ALL, fetch = FetchType.EAGER, orphanRemoval = true)
	private Set<JpaConfigurationParameter> parameters = Sets.newHashSet();

	/**
	 * The database version. Used for detecting concurrent modifications.
	 */
	@Version
	private long databaseVersion;

	/**
	 * Get the ID of this configuration.
	 * 
	 * @return the ID of this configuration
	 */
	// TODO(keith): Move into interface once the migration is over.
	public String getId() {
		return id;
	}
	
	@Override
	public String getName() {
		return name;
	}

	@Override
	public void setName(String name) {
		this.name = name;
	}

	@Override
	public String getDescription() {
		return description;
	}

	@Override
	public void setDescription(String description) {
		this.description = description;
	}

	@Override
	public void addParameter(ConfigurationParameter parameter) {
		JpaConfigurationParameter p = (JpaConfigurationParameter)parameter;
		p.setConfiguration(this);
		
		parameters.add(p);
	}

	@Override
	public void removeParameter(ConfigurationParameter parameter) {
		parameters.remove((JpaConfigurationParameter)parameter);
	}

	@Override
	public Set<ConfigurationParameter> getParameters() {
		Set<ConfigurationParameter> result = Sets.newHashSet();
		
		for (ConfigurationParameter parameter : parameters) {
			result.add(parameter);
		}
		
		return result;
	}

	@Override
	public Map<String, ConfigurationParameter> getParameterMap() {
		Map<String, ConfigurationParameter> map = Maps.newHashMap();

		for (ConfigurationParameter parameter : parameters) {
			map.put(parameter.getName(), parameter);
		}
		
		return map;
	}

	@Override
	public String toString() {
		return "JpaActivityConfiguration [id=" + id + ", name=" + name
				+ ", description=" + description + ", parameters=" + parameters
				+ "]";
	}
}
